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Discontinued Operations (Details) (USD $)
In Thousands
3 Months Ended9 Months Ended3 Months Ended
Sep. 25, 2011
Sep. 26, 2010
Sep. 25, 2011
Sep. 26, 2010
Dec. 27, 2009
WQXR FM Radio Station [Member]
Discontinued operations     
Proceeds from sale of WQXR-FM    $ 45,000
Pre-tax gain from sale of WQXR-FM    35,000
After-tax gain from sale of WQXR-FM    19,000
(Loss)/income from discontinued operations, net of income taxes$ 0$ (224)$ 0$ 13